4,253 research outputs found
Predicting Factors of Breakthrough Infection in Children with Primary Vesicoureteral Reflux
∙ The authors have no financial conflicts of interest. © Copyright: Yonsei University College of Medicine 2012 This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial Licens
Development of Computer Aided Prediction Technology for Paroxysmal Atrial Fibrillation in Mobile Healthcare
Domain Adaptive Transfer Attack (DATA)-based Segmentation Networks for Building Extraction from Aerial Images
Semantic segmentation models based on convolutional neural networks (CNNs)
have gained much attention in relation to remote sensing and have achieved
remarkable performance for the extraction of buildings from high-resolution
aerial images. However, the issue of limited generalization for unseen images
remains. When there is a domain gap between the training and test datasets,
CNN-based segmentation models trained by a training dataset fail to segment
buildings for the test dataset. In this paper, we propose segmentation networks
based on a domain adaptive transfer attack (DATA) scheme for building
extraction from aerial images. The proposed system combines the domain transfer
and adversarial attack concepts. Based on the DATA scheme, the distribution of
the input images can be shifted to that of the target images while turning
images into adversarial examples against a target network. Defending
adversarial examples adapted to the target domain can overcome the performance
degradation due to the domain gap and increase the robustness of the
segmentation model. Cross-dataset experiments and the ablation study are
conducted for the three different datasets: the Inria aerial image labeling
dataset, the Massachusetts building dataset, and the WHU East Asia dataset.
Compared to the performance of the segmentation network without the DATA
scheme, the proposed method shows improvements in the overall IoU. Moreover, it
is verified that the proposed method outperforms even when compared to feature
adaptation (FA) and output space adaptation (OSA).Comment: 11pages, 12 figure
Early and mid-term results of coronary endarterectomy: Influence of cardiopulmonary bypass and surgical techniques
Background: Coronary endarterectomy (CE) may be a good option for complete revascularization of diffuse coronary artery diseases, but it has not been widely used because the outcomes have not been definitively identified. This study aims to evaluate the mid-term clinical results of CE and compare the outcomes according to the use of cardiopulmonary bypass (CPB) and the surgical technique used.
Methods: Between 2004 and 2014, 69 cases of CE were performed in 64 patients. We divided the patients into two groups: 1) on-pump coronary artery bypass with coronary endarterectomy (ONCAB-CE) versus off-pump coronary artery bypass with coronary endarterectomy (OPCAB-CE), and 2) “open” versus “closed” surgical techniques. Operative mortality and major morbidity, were investigated including perioperative myocardial infarction (PMI), and overall survival.
Results: Operative mortality was 4.7% (3/64), and no PMI was observed in the study. No statistical differences in operative mortality rate between the ONCAB-CE and OPCAB-CE groups were found (3.1% vs. 6.2%, p = 1.0) or between open versus closed techniques (6.7% vs. 2.9%, p = 0.6). The incidence of major morbidity including cerebrovascular accident, atrial fibrillation, acute renal failure, mediastinitis, respiratory complications, and bleeding was comparable between all groups. There were seven late mortalities, and no differences were found in overall survival rate between all groups.
Conclusions: Coronary endarterectomy appears to be a safe option for patients with diffuse coronary artery disease, regardless of whether CPB or a specified selection of surgical techniques are used
Diffuse Alveolar Hemorrhage in a 39-year-old Woman: Unusual Initial Presentation of Microscopic Polyangiitis
Microscopic polyangiitis (MPA) is a necrotizing vasculitis involving the small vessels without granulomatous inflammation. Most MPA initially presents with renal involvement without pulmonary involvement. Isolated and initially presenting alveolar hemorrhage is very rare. The patient was a 39-year-old female with a progressive cough, dyspnea, and blood-tinged sputum for the previous 5 days. We determined that her condition was MPA though VATS lung biopsy and renal biopsy. After 2 months of steroid therapy, the chest lesions had improved. We report here a rare case of MPA with isolated and initial involvement of the lung with a review of the literature
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